/*******************************************************************************************
 * Copyright (c) 2009 Alex Robson, Rob Simmons, Craig Israel, and Rachel Twyford
 *
 * Use of this software in any form requires that you have both 
 * read and agreed to the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions: 
 *
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution.
 * Neither the name of Nvigorate nor the names of its contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission. 
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 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY
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using System;
using System.Linq;
using System.Xml.Linq;

namespace Nvigorate.Data.Query
{
    [Serializable]
    public class TableVariable : TableAction<TableVariable, SchemaColumn>
    {
        #region Overrides of QueryComponent

        public override XElement GetXElementRepresentation()
        {
            return new XElement("tableVariable",
                    new XElement("table", _table.GetXElementRepresentation()),
                    new XElement("columns", _columns.GetXElementRepresentation())
                );
        }

        public override object ParseXElement(XElement element)
        {
            XElement tableElement = element.Element("table");
            XElement columnsElement = element.Element("columns");

            _table = tableElement != null ?
                QueryDeserializer.DeserializeAmbiguousChild<Table>(tableElement.Descendants().First()) : null;
            _columns = columnsElement != null ?
                QueryDeserializer.DeserializeAmbiguousChild<QueryList>(columnsElement.Descendants().First()) : null;

            return this;
        }

        #endregion

        public TableVariable()
            : base(null, null)
        {
        }

        public TableVariable(Table table, QueryList columnList)
            : base(table, columnList)
        {
            _table.IsVariable = true;
        }
    }
}